We were in Whittier a couple of weeks ago and I recall no misquitoes. It's a port city with many boats but few bugs, IMO. Took the Alaska RR from Anchorage to Wittier. Great ride, wonderful views. If you call your cruise line they will have a schedule so you will know if you will have enough time to shop. (My guess is that you will have plenty of time) Of course, who knows when the ship comes into port? Note: all real property in Whittier is governmet owned~was an Army base in WWII.